Finding the Fourth Proportional to 78,506.92, 108,343.98 and 42,696.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,506.92 : 108,343.98 = 42,696.21 : x
2. Step 2: Convert to fraction form
   78,506.92/108,343.98 = 42,696.21/x
3. Step 3: Cross multiply
   78,506.92x = 108,343.98 × 42,696.21
4. Step 4: Simplify right side
   78,506.92x = 4,625,877,728.61
5. Step 5: Solve for x
   x = 4,625,877,728.61/78,506.92
6. Step 6: Final answer
   x = 58,923.18